Note that these colors were chosen with 256-bit color in mind. This is my first contribution on github, so if something isn't working, please let me know.
Vim Plug: add Plug: 'HenryNewcomer/vim-theme-underflow' within the plugin
area. After, the plug#end() area, add colorscheme underflow.
If using another plugin manager, such as Vundle, the steps are appropriately similar. Just reference your plugin manager's manual for further assistance.
Linux/Mac OS) If on a Unix-based OS, simply clone/save this and place it in your ~/.vim/colors/ directory (assuming you haven't changed this path).
I haven't included a license, yet, but these files are free to use as you see fit, as long as you don't claim to take credit for the original file.